Agatha Christie is an author of crime novels, short stories and plays. He also wrote stories under the name Mary Westmacott romance, but he is most remembered for her 66 detective novels and 15 short story collections. According to the Guinness Book of World Records, Christie is the best-selling novelist of all time. His novel has sold about four billion copies, and claimed that his works entered in the ranks third after William Shakespeare and the Bible, as the most widely published book.

According to the Index Translationum, Christie is the individual authors whose books most widely translated, at least 103 languages. In 1955, Christie was the first award recipient Mystery Writers of America, from the Grand Master Award. In the same year, the work of Witness for the Prosecution was awarded the Edgar Award, MWA for Best Play. Many of the books and short stories have also been filmed and adapted for television, radio, video games and comics like Murder on the Orient Express, Death on the Nile and 450 From Paddington.

Agatha Christie published two autobiographies. "An Autobiography", from birth to age 75. Come, Tell Me How You Live on archaeological excavations in Syria and Iraq with her second husband, archaeologist Max Mallowan, which was published in 1946.

From 1971 to 1974, Christie's health began to fall, and he continued to write. More recently, the Canadian researchers using experimental textual tools of analysis, stating that Christie may have been suffering from Alzheimer's disease or other dementias. He died on January 12, 1976 at the age of 85 at his home, Winterbrook, Berkshire.